Which statement about paging and external fragmentation is correct?

Options

  • A. Paging completely eliminates all forms of fragmentation
  • B. Paging eliminates external fragmentation but may cause internal fragmentation
  • C. Paging requires every process to occupy one contiguous physical block
  • D. More than one of the above
  • E. None of the above

Correct Answer (Detailed Explanation is Below)

B. Paging eliminates external fragmentation but may cause internal fragmentation

Detailed Explanation

Correct Answer: Paging eliminates external fragmentation but may cause internal fragmentation.

Explanation: Paging divides logical memory into fixed-size pages and physical memory into equal-sized frames. Pages can be placed in non-contiguous frames, eliminating external fragmentation in ordinary paging allocation. The last page may contain unused space, causing internal fragmentation.
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BPSC TRE 4 operating system practice set 3

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